Fluid Around My Heart My Mom Has Fluid Around Her Heart What Could This Mean?

My mom has fluid around her heart what could this mean? - fluid around my heart

I just found out yesterday that my mother was rushed to the hospital the doctors said no accumulation of fluid around his heart. However, it is something in my legs to get his heart during the day. Does anyone know the possible outcome of fluid around the heart? This can happen, I do not know if it is diagnosed, or if it is dark something that is not at all uncommon.